%

N

Cause

91.9

206

Exposure to the cold air

30.4

68

Viral infections

27.6

62

Stroke

13.8

31

Genetic factors

8.5

19

Diabetes

7.1

16

Evil eye

6.7

15

Elderly

4

9

Magic

0.4

1

Pregnancy

0.4

1

Vitamin B deficiency